My favorite Larson E. Rapp article was the one about the buried
antenna. He had read in the Antenna Book that every dipole has an
image antenna an equal distance below ground. So he figured you could
just as well put the real antenna under ground and then the image would
be up in the air.
I
Finally, relief from my homeowners' association's restriction on
antennas!
Forget verticals and dipoles, I'm going to go bury a 4-el tribander in
my back yard as soon as I find the time! ;-)
73,
Dave K7DAA
http://www.k7daa.com
On Mar 19, 2008, at 11:10 PM, Alan Bloom wrote:
My favorite
Forget verticals and dipoles, I'm going to go bury a 4-el tribander in
my back yard as soon as I find the time! ;-)
Don't forget hole safety procedures when descending into your hole. Many
lifes have been lost due to negative gravity effects a deep hole causes.
Also your hole needs to be at
Would you mind expanding on the below - in what way are you adjusting
the Bands to VFO? I assume this is some configuration procedure, but I
can't figure out which one.
73 de M0XDF, K3 #174
--
Extraordinary claims require extraordinary evidence.
-Carl Sagan, astronomer and author (1934-1996)
Thanks all for replies - it appears the oven control is generating
some harmonics that are getting onto the 5MHz and then I'm picking
them up - if i don't create some form of closer connection - currently
just have the output lead (floating BNC) about 1' from K3.
The single wire solution
Hi list,
Bit of a strange issue here with serial comms between the PC and the K3.
First a bit of description about my set up: I use an external noise sense
antenna in addition to the main station antenna to cancel out some nasty
local electrical noise with a Timewave ANC-4 noise phasing unit.
Don't forget to point the rotator downwards.
Kevin
VK3DAP / ZL2DAP
Dave Andrus wrote:
Finally, relief from my homeowners' association's restriction on antennas!
Forget verticals and dipoles, I'm going to go bury a 4-el tribander in
my back yard as soon as I find the time! ;-)
73,
Dave
It took a sting of posts this morning for the 'light' to come on - my QST
has not arrived yet.
My very first April QST was back in the early 60s. There was an article
about tapering a single wire feedline to concentrate the power going to the
antenna, full of formulas to derive the proper
My K1 previously listed has been reduced to $375
Mike Pierce
KD8DVV
[EMAIL PROTECTED]
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M1PAF wrote:
Hi list,
Bit of a strange issue here with serial comms between the PC and the K3.
First a bit of description about my set up: I use an external noise sense
antenna in addition to the main station antenna to cancel out some nasty
local electrical noise with a Timewave ANC-4
My K3 #339 went QRV yesterday afternoon after successfully
downloading firmware via the upgraded Mac utility. The previous
version of the utility, which I had downloaded weeks ago in
anticipation, did not allow for successful DSP firmware download.
With the new utility it was a breeze.
I
Hi Tod,
One question remains and it is probably ridiculously simple but I can
not see it. How do I get the K3 to trigger the relay in my Ameritron AL
1200?. I see no connection for a cable to the amp nor nothing in the
config menu.
I don't know the Ameritron AL but KEY OUT should be what you
The KEY OUT RCA jack on the back of the K3 will key the amp.
Phil - AD5X
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Before we laugh too much, underground antennas do work. See Practical Wire
Antennas, John Heys, G3BDQ, p79: Subsurface (underground) Antennas. (OK,
define, work).
Rich
NU6T
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Behalf Of Dave Andrus
Sent: Wednesday,
Well, I think we should remove them again grin.
Rich
NU6T
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Behalf Of Lyle Johnson
Sent: Wednesday, March 19, 2008 10:25 PM
To: T. David Yarnes
Cc: elecraft@mailman.qth.net
Subject: Re: [Elecraft] April QST: review and
-Original Message-
From: Todd Ruby
I received 59+20 and excellent audio from central europe. ... How do I
get the K3 to trigger the relay in my Ameritron AL 1200?.
-
If you're 20 over in Europe, you don't need an amp!! :-)
- Keith N1AS -
- K2 5411.ssb.100 -
-
G4ILO wrote:
Do you get this noise if you connect an audio cable between the computer
and the K3? This would help decide whether the noise is coming from the
computer itself (e.g. poorly suppressed power supply) being coupled to the
radio via the shield, or if it is being generated by the
The Swedish E.E./ham, Loof Lirpa, pioneered underwater HF antennas. A lot
of his work had application to underground antennas as well.
73 Gil NN4CW
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Actually the bulk of the Navy's ELF TX antenna in Clam Lake WI is/was
burried underground...
Jon
w1jp
Before we laugh too much, underground antennas do work. See Practical
Wire
Antennas, John Heys, G3BDQ, p79: Subsurface (underground) Antennas. (OK,
define, work).
Rich
NU6T
snip/
M1PAF wrote:
I'll try that. What makes me think it's the serial port is that connecting
the serial cable doesn't increase the noise level, it's only when the
computer is polling the radio (i.e. traffic over the cable). I've already
addressed general computer hash and that's down to an
Paul Christensen wrote:
Bruce, as Barry points out, the K3's audio response really needs the
ability to extend down significantly lower than the current ~ 250 Hz
we're not concerned with the broadcast of music in our service, then the
male voice (lowest relevant fundamental of 70 Hz) and
Hi Paul,
i do have the same issue from the beginning.
Only connected to the computer makes no problems.
But as soon as the computer starts with data transfer you can hear that.
Disconnecting the interface stopped that 'noise'.
In addition the normal signal gets louder. Which could be the AGC...
Paul
I use a serial cable from Maplin and it works just fine. Part number
L67BT from http://www.maplin.co.uk/
73 Dave, G4AON
K3/100 #80
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Paul,
Anytime I have seen strange problems with serial cables they've been caused by
homebrew cables. Please see if you have an OEM straight through cable (not a
null
modem cable) and see if that helps. Also make sure the jack screws are well
secured to the K3 to maintain a good solid
Todd
Beware the manual for the AL1200 doesn't appear to mention the change
over timing of it's relay, the K3 outputs RF approx 10 milli seconds
after the linear keying line goes low - measured on mine with a half
decent scope. There is currently no adjustable delay for that timing in
the K3
Todd -
KEY OUT on the back of the K3 is for connecting to an external amp.
-
73,
Greg - AB7R
Whidbey Island WA
NA-065
K3#0009 and 0319
On Thu Mar 20 5:27 , Todd Ruby sent:
My K3 #339 went QRV yesterday afternoon after successfully
downloading firmware via the
S Sacco wrote:
Hi Wayne -
Any chance for more thorough testing
Hi Steve,
Yes. I normally do this myself, but was fighting the flu for several
days and missed this one. It was unfortunate timing, as I had just
rewritten a big chunk of code in preparation for additional subreceiver
Billions of people are quite happy with the 300kHz cutoff used by the
public telephone system (a total of 3.1kHz between 300 and 3.4kHz).
Presumably, you mean 300 Hz, and not 300 kHz.
The critical frequency for speech communications is the lowest formant
frequency; it is the resonances in the
I guess as of now I'm out of luck if I want to use my amp with a K3. I just
checked the manual for my AL-811H and The open frame relay in the AL-811H
takes approximately 15ms to switch states. My K3 is on order. I hope
there's a K3 firmware change made before I get my K3, that will allow me to
Well, at least I thought it was funny...
In other words, I got it LOL!
DOUGLAS ZWIEBEL wrote:
Thanks for the link!
You know, I just realized that Elecraft doesn't even HAVE a sales
brochure...so it MUST be a piece of junk. I mean, just LOOK at that
sales brochure from Icom. CLEARLY,
I have the same issue with a slow switching linear and am thinking about
putting a slow relay in the keying circuit which I need anyway to invert the
keying signal.
-
Chuck, AE4CW
--
View this message in context:
http://www.nabble.com/K3-and-linear-amp-tp16180386p16181739.html
Sent
Beware the manual for the AL1200 doesn't appear to mention the change
over timing of it's relay, the K3 outputs RF approx 10 milli seconds
after the linear keying line goes low - measured on mine with a half
decent scope. There is currently no adjustable delay for that timing in
the K3 ...
I
On Thu, 2008-03-20 at 01:39, M1PAF wrote:
The issue I have is this: when I use a USB serial adapter I get no
additional noise issues when the computer is polling the rig. However, my
computer has a serial port which I would rather use. I made up a cable with
pins 2, 3, 4, 5, and 6 straight
Besides considering how nice it sounds we need to be considering how wide our
signals are on the band.Rielly (sp) of FCC fame has warned the ham community
about being careful with the width of our signals when we are trying to
transmit Hifi sounding transmissions.Plus it's just the neighborly
You can still use the amp by manually activating the transmit switch on both
pieces of gear. I do this with one old rig I have. Not the nicest solution but
it will work By the way I have the QSK add on switch and it works real nice
for QSK CW
73 Doug K3DUG
K3 #
-- Original
Hold the phone.
I am using my K3 with an AL80A...basic amp with the same relay as many of the
other Amertrons use. I have seen no issues at all. Also, you might look at
this little gimmick that might help you out here This is the URL
http://www.k6xx.com/radio/fastrely.html
Also,
dalspaugh wrote:
Besides considering how nice it sounds we need to be considering how wide
our signals are on the band.
The signal is 2.7Khz wide regardless of where Fc is. We're not talking
about wider signals, we're talking about enabling a downward shift of the
passband. Besides,
I know there are over 600 happy K3 owners out there now. So would it be
asking too much for a shipping status update that we were supposed to see 2
days ago? The remaining few of us would also like to have an idea when our
order might ship.
Stan
W5EWA
Houston, TX
M1PAF wrote:
This is obviously radiation from the serial cable but I'm at a loss as to
why (incidentally also tried some ferrites on the cable and they made no
difference).
Problem solved. In spite of my experience ho ho - the percieved wisdom to
ground the shield at one end didn't work
Well, for instance, if VFO A in the 40 meter band had a 60 meter frequency
and VFO B had a 40 meter frequency, I would press the A/B button to swap
the VFO's. At this point VFO A now contains a 40 meter frequency and VFO B
would have a 60 meter frequency. I would then press AB to load VFO B
oh, so your saying that you moved through the bands until you got to
40m, but the freq displayed for VFOA was one for 60m?
I think that was a bug once before.
--
The high minded man must care more for the truth than for what people
think. -Aristotle, philosopher (384-322 BCE)
On 20 Mar 2008,
Can anybody explain to me why with NR engaged SSB signal drop's in volume
significantly. AF volume has to be readjusted every time the NR is turned ON
and than again when is turned off.
NR is on F1-1.
I don't believe that this is normal.
Thanks,
Mark
OK, now how am I going to explain to my neighbors in our all mobile home
community why I'm burying wire down the middle of the street? After
all, a 160 meter Rhombic is rather large!! Someone is bound to notice.
73 and tongue firmly planted in cheek,
John W4CWZ
Dave Andrus wrote:
Finally,
Likewise my QST has not yet arrived. Hopefully if the Post Office
mis-delivered it the person reading the magazine would become interested in
becoming an Amateur operator.
Many years ago, the year has been forgotten as has the original source, I
remember reading about a US Army officer in
The whole VFO and memory management in the K3 is badly implemented.
Other rigs have a V/M button (or similar) and also either operate in 1
MHz steps or ham band increments, instantly returning to steps of each
ham band by default. Two examples before I get off my soapbox:
1. If you recall a
Nah - no one will notice, and if they do, just tell them it's part of
your new wireless (hah!) internet hookup.
- Jim, KL7CC
John Payne wrote:
OK, now how am I going to explain to my neighbors in our all mobile
home community why I'm burying wire down the middle of the street?
After all,
Roger Marrotte wrote:
I guess as of now I'm out of luck if I want to use my amp with a K3. I
just checked the manual for my AL-811H and The open frame relay in the
AL-811H takes approximately 15ms to switch states. My K3 is on order.
I hope there's a K3 firmware change made before I get my
I'm sure you would have NO PROBLEM recruiting regression testers, since
the test kit includes a K3 :-)
I volunteer...
OK, so I'm early for the first of April, all the buried antenna thread
has got my reality tweaked...
I actually worked on a project which did some buried antenna
Roger
Go to this site http://www.k6xx.com/radio/fastrely.pdf
K6XX has a need relay speed-up circuit that might be
applicable to the relay in your amp. I suppose that it
requires the relay to be a 12v relay, though. Don't
know what you actually have.
Good luck and 73
Bob N6WG
- Original
I have been amazed and fascinated at the AFX button feature on the K3 and how
much it adds to listening. I have been reading about the effects feature with
the AFX button. The QST 1999 article can be found here:
http://ok1ike.c-a-v.com/soubory/binaural_IQ_RX.pdf
I am sure it can be found
I am having problems with my K2 kit: S/N 030xx (bought used unassembled).
I am in alignment Test II portion of assembly, and I am having the following
problems:
Both my analog and DMM are reading a reistance of from about 15 (on analog
meter) to about 50 ohms (on DMM). After reading some of the
Or rebuild the amp with faster relays like the Jennings RJ1A.
Jim SM2EKM
--
AE4CW wrote:
I have the same issue with a slow switching linear and am thinking about
putting a slow relay in the keying circuit which I need anyway to invert the
keying signal.
-
Chuck,
~
N2CQ QRP CONTEST CALENDAR
March 22 - Apr 21, 2008
~
80 METER FOXHUNT (CW) *** QRP Contest ***
Each Tuesday to Mar 25
9 PM to 10:29 PM Eastern Time USA
Info:
Wondering if others are using their K2 on PSK31 and RTTY? I made my
first PSK31 contact on the K2 last night and the guy said I had a nice
clean signal but I'm curious what settings on the K2 everyone else uses
when running these modes. I'm afraid I may have my RF gain set to high
on the rig or
Wayne, thanks for restoring the offset tone in REF CAL. Please work on
increasing the SSB power output. I can get 1KW output on my amplifier with 28
watts from the K3 when tuning up. However, to get the same output in SSB the
PWR has to be increased to 55 watts. The linear amp wattmeter is
In WSJT's FSK441 screen, there is a useful little window that plots the
amplitude of the noise floor and the decoded signal burst, if any, against
audio frequency. Since FSK441 uses four tones ranging in frequency from 882 Hz
to 2205 Hz, the net passband (after all stages) should ideally be
Hi Elecrafters,
K3/100 kit s/n 615 arrived today in Crespieres (30 km west of Paris).
Ordered 8 Septembrer 2007, shipped on 18 March 2008 from Aptos.
73
Raymond, F4FNT (K2 s/n 5,636)
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Hi Roy,
Please work on increasing the SSB power output. I can get 1KW output
on my amplifier with 28 watts from the K3 when tuning up. However, to
get the same output in SSB the PWR has to be increased to 55 watts.
I haven't had a chance to test the newest firmware yet, but this sounds
a
This is my experience too with the K3 NB.
I believe it is normal, but question why the AF level can not be auto
adjusted to offset this reduction with the NB engaged.
mark roz wrote:
Can anybody explain to me why with NR engaged SSB signal drop's in volume
significantly. AF volume has to
For NB please read NR, still, why the reduction in volume?
mark roz wrote:
Can anybody explain to me why with NR engaged SSB signal drop's in volume
significantly. AF volume has to be readjusted every time the NR is turned
ON and than again when is turned off.
NR is on F1-1.
I don't
I rely on my MicroHam Microkeyer to key the rig and amp. You can set the
delay in the MicroKeyer.
You can also insert a half character space at the beginning of your CW
macros so there is a slight delay between going into transmit mode and
actually
transmitting. In the N1MM contest
Alas...both Winday and I are otherwise tied up this evening
But don't let that stop anyone from getting on 7190 +/- at 0100UTC and beating
the bushes for some Elecraft SSB mojo!!!
Have fun Elecrafters!
73, Roger
WA7BOC K3 #75
--
I am using the free version of SPAMfighter for private
Dave,
We'll take your comments on this constructively (as input to future
firmware revisions). The present front panel layout and functionality
was carefully crafted over a full year, then vetted by about a dozen
very smart contest/DX operators, but of course it can never achieve
perfection
Worth reading I think
http://www.eham.net/articles/18767
73 Doug K3DUG
K3 #?
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Is it really a reduction in volume, or is it that with the noise gone,
it sounds quieter?
I've noticed the 'apparent' reduction in volume, but I actually think
its that the NR has removed all the spurious noise and the result is a
cleaner audio that somehow sounds lower volume.
--
The high
I build my KAF2, and it works -- amazing since I don't think a single
kit I've ever built worked the first time I tried it ... well except the
K2 and KX1, both of which worked first try. Now, I just have to figure
out how to use it on the air.
73,
Fred K6DGW
- Northern California Contest
Worth reading I think
http://www.eham.net/articles/18767
Read the second reply from ZENKI.
If this is not RFEXPERT from eHam reviews infamy, it's
his close cousin.
Can you say agenda? Sure ya can!
The official sour grapes talking points for anyone
with an axe to grind is likely to be best
Hi Fred
I used one before I put the KDSP2 in my K2.
The KAF2 will work best if you keep signal
levles into it down and use more audio gain
after the filter. I seem to recall there is some
way to adjust gain in the filter, but I forget just
what it is. Where you have enough signal
strength, you
Hello?
...a US Army officer in World War I that wanted/needed to get a message to
the headquarters.
The officer sent a runner through enemy lines to HQ telling them how the
message would be sent.
And why did he not give the message to the runner?
Sigh. grin
Rich
NU6T
-Original
Tonight's net is on 7.1875 Mhz
- Original Message -
From: Roger Stein [EMAIL PROTECTED]
To: Elecraft (E-mail) elecraft@mailman.qth.net
Sent: Tuesday, March 18, 2008 8:37 AM
Subject: Spam Low E-Mail [Elecraft] Report for Elecraft SSB Net - Monday
night March 17
Good morning,
Seven
David,
There is nothing to think about.
There is for sure significant reduction of volume.
Just listen to the station on 20m (low noise) using speaker 4 feet away. Adjust
the volume (to low level) to the point that you could still understand what the
person is saying. Than push NR. I bet that
We certainly don't hear the uproar about the late updates that we did
just a couple of months ago. So that tells me that there are either less
people waiting for K3s, or that the Europeans have all gotten their K3s.
Maybe if I stir the pot and make enough noise, we will get some
Stan - it would take them longer at this point in the
K3 delivery cycle than it's worth to update more than
every 2 weeks and they've been fairly good about that.
At any rate, when did you order?
Maintaining their present breakneck rate, March will
ship orders placed in August and September,
Thanks for the update !!!
Stan
W5EWA
Houston, TX
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Story of my life Don...just above the noise. :-)
The update was due this past Tuesday. That's when the last one ran out,
date wise. I ordered Oct. 13. I figure I'll get mine sometime in April. But
I, like others in the recent past, would like to see those updates on a
regular basis as
I ordered my K3 on Oct. 11th In February I was told to expect my unit mid to
late March. Monday I was told mid April.
Larry Putman WB3ANQ
Pasadena, Maryland FM19rc
www.wb3anq.com
- Original Message
From: Don Rasmussen [EMAIL PROTECTED]
To: ElecraftQRXQRXQRX List
Larry, we may be in the next update, but if my luck holds out it will be
the one after that. So I figure: 2 weeks per update = 4 weeks...then two
weeks notice for the shipping and one week for the ACTUAL shipping. So MINE
could be 5 weeks away, or more likely 7 weeks. But I am hoping for 5
Five months ago I could have cared less and
resided myself to the fact that I would get a K3 some
day. Now I am getting ants in my pants.
Been there, done that - my wait was 9 months! The
radio is absolutely worth the wait and the ants are a
distant memory... ;-)
K3 Serial #588 came to life tonight. Made my first contact with Roy W4WFB
on 80 meters. Now the fun begins!
Mike - W4OCO
K3 588
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Yes Mark you are not alone. I normally run with the AF gain set at 9
o'clock. but when the NR is on I have to advance to nearly 11 o'clock
for the same volume from the speaker. In config , my AGC settings are
all at the default and AF GAIN is set to Hi.
I have a couple of skeds where the
80 matches
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